This article aims to clarify some fundamental notions of the Christianity's reconstruction of Soren Kierkegaard (1813-1855). First, there will be a distinction between historical belief and Christian faith, which serves as a basis for understanding the existential relationship that the individual can develop with the teaching of Christ. Thereafter, there will be a reference to the concept of spirit proposed by the Danish thinker, marking with this the Kierkegaardian stages of existence. And finally, the two points above will be connected with what Kierkegaard means by truth and freedom in the religious context.